Multistage turbo-pump.



No 846,971. PATENT-ED MAR. 12, 1907.

N. W. AKIMOFF.

I 'MULTISTAGE TURBO PUMP.

APPLICATION 'rlnnp JULY 21. 1906.

WITNESSES: k} W Br l TTOHIIEY.

No. 846,971.. PATENTED MAR. 12, 190?. N. W. AKIMOPF.

. MULTISTAGE TURBO PUMP.

APPLIOATION FILED JULY 21. 1908.

2 sums-sum a.

. IIIYEIIT SSES WITIIE M I nrraknzr.

STA'L ES PAllENT OFFICE.

NICHOLAS w. AKIMOFF, or PHILADELPHIA, PENNSYLVANIA.

MULTISTAGE TURBO-PUMP Specification of Letters Patent.

Patented March 12, 1907.

Application filed'J'uly 21. 1906. Serial No. 327.132,

' -T all whom it may concern.-

Be' it known that I, NrciionAs AKI- MOFF, a subject of the Czar ofltussia, but

' now residing at the city ,of'Philadelphia, in

the county of Philadelphia and btate of Pennsylvania, have inventedcertain new and useful improvements in Multistage Turbo-Pumps, of whichthe following is a specification. My. invention hasrelation to amultistage turbo-pump, and in such connection it relates to the generalconstruction and arrangement of such a pump. 7

The principal objects of my invention are, first, to simplify andincrease the efiiciency of a multistage turbo-pump by dispensing withthe stationary wheels; second, to provide a pump of the characterdescribed with a housing and runners rotatably arranged therein; third,toconnect the runners with each other to form a solid body, and therebyto permit of rotation of the same in unison and of decreasing thelateral thrust along the shaft,

fourth, to shape therunners so as to dispense with packing, and therebypossible leakage between the same; fifth, to shape the stationaryhousing and runners therein so as to reduce contacting surface to aminimum, to thereby prevent wear" and tear, as well as leakage caused bywear, and, sixth, to dispense with a discharge-difiuser on the outerperiphery of the wheels by replacing the same with a sleeve which whileperforming the same function is adapted to're'duce the size of themachine, as well as to. avoid the working arts being subjected tounbalanced strain. or influence of outside diffusers.

The nature and scope of my presentinvention will be more fullyunderstood from the following description, taken in connection with theaccompanying drawings, forming 1. v v Referring to the drawings, .6represents a housing, preferably consisting ofa substantially annularbody 7, forming the standard of the pump, and sides 8, substantiallycircular in outline, removably connected to the body 7 by bolts or otherfastening means 9. One of the sides 8 is provided with a hollow annularextension 10, forming an inlet 11 for fluid into the housing 6, and theother of the sides7 is provided with a tubular extension 1 12, formingan outlet 13'for fluid, a bearing a 14 for a shaft-15, which issupported at its other end by the extension 10, and a bearing 16 for apurpose to be presently more fully described. v v 1 Within the housing 6and secured to the shaft 15 are arranged a series of runners, in

the present instance four runners 17, 18, 19, i

and 20, each consisting of dish-shaped sections united to each other bycurved blades, forming chambers 21 for the passage of fluidtherethrough. The shaft 15 and by the same the runners 17, 18, 19, and20are rotated by a pulley 26 and a belt (not shown) from any suitablesource of power in the direction inand 3. ,When the runners are rotated,the blades 22 of the runner 17 owing to their outline, force the fluidentering the inlet-chamber 1 1 of the housir. g 6 surroundir. g'theshaft '15 and the chambers 21 of the runner 17, at the point 31' towardtheperiphery thereof, aided in such action by centrifugal force, whilethe blades 23 of the adjoinirg runner 18, owingto their outline, forcethe fluid entering the same at the pomt 32 adjacent to its peripherytoward the shaft 15, and so on in regular sequence back and forththrough the runners 19 and 20 until the fluid by means of the runner 20is forced into a diffuser formed by a sleeve 24, which surrounds theshaft 15, from which by ent erir g the out-' let 13- of the housing 6 itis forced to any point for utilizationv (Not shown.)

The difl'user 24 is provided with blades 25 of suitable outline androtates Within the bearing 16 of the housing 6, which latter byaflording an extended bearing-surface 33 renders the use of packing,material unnecessary at this point, and thereby prevents leakage due tothe wear of such material. Moreover, by the arrangementof thediffusersleev 24 adjacent to the shaft 15 the unbalanced strain to whichdischarge-difi'users locatedon the outer peri hery of one of the wheelsof multistage tur o-pumps are subjected is thereby appreciably lessened,avoiding thereby the breakage caused partially by suchfstrain and by theoutline of the diffuser.

I dicated by thearrows, as shown in Figs. 2- I Leakage of fluid is alsoprevented at the point of contact 34 of the runner 17 with the side 8 ofthe housing 6, as the fluid being under no pressure at this point willnot pass between. the smooth abutting surfaces of the same. At the sametime, owirn to the provision of extended smooth abutting surfacesbetween the runners 17, 18, 19, and 20 and the absence of packing,lealage is therebyavoided, thus rendering the pump very efficient andprolonging thereby the usefulness of the same. One mode of rigidlyconnecting the runners 17, 18, 19, and 20 with each other and holdingthe same closely together consists of bolts 28 passing therethrough in amanner as shown in Fig. 1, with nuts 29 engaging the bolts 28 and endrunners 17 and 20. The runners so connected will form a solid bodyorunit and when rotated will insure uniformity of motion thereof. Thediffuser-sleeve 24:, being removably connected with the runner 20 bybolts 30, is rotated in the bearing 16, formed in the housing 6. Theportion of the shaft 15 exposed in the outlet 13 may be provided with asleeve, (not shown,) which protects the same against the action of thefluid passing through the outlet 13. The chambers 21 of the runners 17,18, 19, and 20 form in a plane transversely of the shaft 15 a circuitouspassage-Way for fluid, which communicates with the centrally-an rangedinlet 11 and outlet 13 of the housing 6.

By this arrangement of the respective runners the lateral thrust on theshaft15 iselimihated, and the slight thrust induced by the exit of fluidfrom the sleeve 24 into the outlet 13 serves to force the abuttingsurface 34 of the runners against a similar surface of housing 6, whichis sufficient to maintain the joints between the runners and housingfluidti ht. I

I-Iaving thus described the nature and objects of my invention, What Iclaim-as new, and desire to secure by Letters Patent, is 1. In a pump ofthe character described, a housing provided with an inlet and an outlet,a'series of runners arranged side by side in the housing, each of saidrunners having an internal chamber extending from one side to the otherto permit in contiguous faces of said runners a direct communication ofthe chambers with each other, and said runners adapted, when rotated, tosuck fluid through the inlet of the housing and discharge. the samethrough the outlet thereof.

2. In a pump of the character described, a housing provided with aninlet and an outlet, a series of runners arranged side by side in thehousing, each of said runners having an internal chamber extending fromone side to t the other to permit in contiguous faces of said runners adirect communication of the chambers with each other, and said runnersadapted, when rotated, to suck fluid through the inlet of the housingand discharge the same through the outlet thereof and to confine thefluid within its chambers during passage through said housing.

3'. In a pump of the character described, a housing provided with aninlet and an outlet, a'series of runners arranged. side by side in thehousing, each of said runners having an internal chamber terminating atone side near the central portion and at the side opposit thereto nearthe perimeter thereof to form a circuitous passage-Way through saidrunners by directly communicating with each other in contiguous faces ofthe runners.

4. In a pump of the character described, a l housing provided with aninlet and an outlet, a series of runners arranged side by side in thehousing, each of said runners having an internal chamber terminating atone side near the central portion and at the side opposite thereto nearthe perimeter thereof to form a circuitous passage-Way through saidrunners by directly communicating with each other in contiguous faces ofthe runners and means for connecting the runners with each other byengaging portions located adjacent to the pernneter thereof.

5. In a pump of the character described, a housing provided with aninlet and an outlet, a series of runners arranged side by side in thehousing, each of said runners having an internal chamber extending fromone side to the other to ermi-t in contiguous faces of said runners adirect communication of the chambers with each other and blades arrangedin'each of the chambers of the runners for forcing, through.

6. In a pump of the character described, a housing provided with aninlet and an outlet, a series of runners arranged side by side in thehousing, each of said runners having an internal chamber extending fromone side to the other to permit in contiguous faces of said runners adirect communication of the chambers with each other, blades arranged ineach of the chambers of the runners for forcing, when rotated, fluidtherethrough, and a diffuser forming a sleevev and connecting thechamber of one of said runners with the outlet of said housing. t 7. Ina pump of the character described, a stationary housing having acentrallylothe housing, a series of flat hollow bodies resting side byside and forming connected the inIet of the housing and terminatingradially adjacent to the shaft and peri hery of the hollow bodies,blades arrange in the chambers of the bcdies for forcing fli. idtherethrough, a centrally-arranged diffuser f orming a sleevesurrounding the shaft and connecting the chambers of the bcdies with theoutlet of the housing, means for coLnct-tirg the bodies with each otherto form fluidcated inlet and an outlet, a shaft carried by.

when rotated, fluid therepassa e-chambers for fluid connected with tightjoints between the housing and runners, the portion of the first of'said bodies contact and means for rotating said shaft and by the samesaid bodies and diffuser.

ing with said housing adapted to form fluid- I tight joints between saidhousing and bodies,

.8. In a pump of the character described, a stationary housing having acentrally-located inlet and an outlet, a shaft carried by the housing, aseries of flat bodies carried by the shaft, each having a chamberforming combined a circuitous passage-way for fluid and communicatingwith the inlet and the outlet of said housing, and means for connectingsaid bodies with each other so as to form fluid-tight joints between thesame.

and means for connecting said bodies with each other to form fluid-tightjoints between tlie same.

10. In a pum of the character described,

a housing provi ed with an inlet and an outlet, a shaft carried by saidhousing, a series of hollow runners mounted on said shaft, each having achamber forming combined circuitous passage-ways, a sleeve terminatnigmthe outlet of said housing, the

9, In a pump of the character described, a stationary housing having acentrally 10- Y cated inlet and an outlet, a shaft carried by to forcesaid runners at the inlet of said pasthe housing, a series of flatbodies resting side by side and forming a unitary structure carriedbysaid shaft, each of said bodies having a chamber forming combined acircuitous i passage-way for fluid connected with the inlet ingwitnesses. chambers of said bodies for forcing when rotated fluidtherethrough, a diffuser-sleeve connecting the bodies with said housingand of said housing, blades arranged in each of the conducting the fluidfrom the chambers thereof to the outlet, said diffusereslceve andassage-ways of said runners adapted to e iminate lateral thrust of therunners on said shaft, and said sleeve adapted in the discharge of saidfluid NICIIOLAS W. AKIMOFF.

Witnesses:

GEo. W. REED, Tnonns M. SMiIH.

